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As the covid-19 pandemic accelerates, governments are warning people at high risk to be particularly stringent in observing social distancing measures because if they become ill they are more likely to need critical care including ventilation, and to die.1 Most data on covid-19 are from China, and although most confirmed cases have been classified as mild or moderate, 14% are severe and 5% critical.2 Case fatality rates are difficult to assess with certainty but could be as high as 1%,3 4 which is much greater than seasonal influenza at about 0.1%.

The largest study on COVID-19 to date1 showed that the prevalence of elevated aminotransferases and bilirubin in people faring worst was at least double that of others. Although clinically significant liver dysfunction was not quantified, this and other studies have led some to suggest that this finding might present clinical challenges. 2 Close inspection of the available data supports a higher prevalence of abnormal aminotransferase levels in severe COVID-19 disease, but these studies actually suggest that clinicallysignificant liver injury is uncommon, even when data for the most severelyill patients are selected (table).

The epidemic of the 2019 novel coronavirus (2019-nCoV) infection has presented as a critical period. Until February 23th 2020, more than 77 000 cases of 2019-nCoV infection have been confirmed in China, which has a great impact on economy and society. It has also interferred with ordinary medical practice of oral and maxillofacial surgery seriously. In order to protect oral and maxillofacial surgery medical staff from 2019-nCoV infection during the outbreak period, this paper suggests the necessary medical protective measures for oral and maxillofacial surgery outpatient and ward.

The newly emerged coronavirus disease (COVID-19) is a respiratory disease caused by a novel coronavirus (2019-nCoV) which was first identified in China in December 2019. It is a highly contagious infection that can spread from person to person through close contact and respiratory droplets. The healthcare personnel of the Department of Oral and Maxillofacial Surgery are especially vulnerable to the infection due to their extensive and close exposure to patients’ oral and nasal cavities and secretions. As one of the busiest specialised hospitals in the world, the Department of Oral and Maxillofacial Surgery of Peking University School and Hospital of Stomatology summarised the experience with disease prevention and control and clinical recommendations on the examination, diagnosis and treatment processes, clinical management, healthcare personnel protection and disinfection amid the continued spread of the pandemic.

The outbreak and diffusion of SARS-CoV-2, responsible for the coronavirus disease (COVID-19), has caused an emergency in the health system worldwide. After a first development in Wuhan, China, the virus spread in other countries, with Italy registering the second highest number of cases in Europe on the 7th of April 2020 (135,586 in total). The World Health Organization declared the pandemic diffusion of COVID-19, and restrictive measures to limit contagion have been taken in several countries. The virus has a predominantly respiratory transmission through aerosol and droplets. The importance of infection control is therefore crucial in limiting the effects of virus diffusion. We aim to discuss the risks related to dental practice and current recommendations for dental practitioners. A literature search was performed to retrieve articles on the management of COVID-19 diffusion in dental practice. The documented clinical experience, the measures of professional prevention, and the actual Italian situation were reported and described. Four articles were retrieved from the literature search. Among the eligible articles, 3 reported measures to contrast COVID-19 diffusion. The infection management protocols suggested were reviewed. Finally, recommendations based on the Italian experience in terms of patient triage, patients’ entrance into the practice, dental treatment, and after-treatment management are reported and discussed. COVID-19 is a major emergency worldwide, which should not be underestimated. Due to the rapidly evolving situation, further assessment of the implications of COVID-19 outbreak in dental practice is needed.

Since its emergence in December 2019, corona virus disease 2019 (COVID-19) has impacted several countries, affecting more than 90 thousand patients and making it a global public threat. The routes of transmission are direct contact, and droplet and possible aerosol transmissions. Due to the unique nature of dentistry, most dental procedures generate significant amounts of droplets and aerosols, posing potential risks of infection transmission. Understanding the significance of aerosol transmission and its implications in dentistry can facilitate the identification and correction of negligence in daily dental practice. In addition to the standard precautions, some special precautions that should be implemented during an outbreak have been raised in this review.

we would like to raise awareness on the coronavirus disease (COVID-19) outbreak that is spreading world-wide and represents an international sanitary emergency1. Our concern regards the feasibility of a safe return to dental offices without adopting appropriate measures in advance. In dental settings, the pathogens can be transmitted through inhalation of airborne microorganisms that can remain suspended in the air for long periods or through direct contact with fluids or other patient materials, contact of mucosae with infected aerosol propelled at short distance by coughing and talking without a mask, and indirect contact with contaminated instruments and/or environmental surfaces2,3.